Lately I've been attempting to draw all of the roller ships that there are available image references or specifications for, and while doing research on the Knapp Roller Boat I came across this odd little vessel proposed during WWI to serve as a littoral sub chaser. Most likely inspired by the SS Ernest Bazin, the vessel features two Bazin rollers in the front and a larger, single roller with paddles in the rear.
You can find the other roller ships drawn in SB scale in the Merchant Ships thread in the Real Designs section and the Roller Ships thread in the Never Built section.